#
print('apple' > 'app')  # True
print('apple' > 'banana')  # False
print(ord('a'), ord('b'))  # 97 98;97<98;这是 Unicode码值
print(ord('黄'))  # 40644
print(chr(40644))  # 黄   ord和chr是相互对应的函数
'''
== 与 is 的区别
== 比较的是 value
is 比较的是 id
'''
a = 'PYTHON'
b = 'PYTHON'
c = 'PYTHON'
print(a==b)     #   True
print(b==c)     #   True
print(a is b)   #   True
print(b is c)   #   True
print(id(a))
print(id(b))
print(id(c))    #   a\b\cid相同



